Improvement in elevators



UNITED STATES PATENT CEEICE.

4 PHILIP. HENNEET, OENEW YORK, N. v.

|MPRovEMENT 1N ELEvA-ToRs.

.Specification forming part of Letters Patent No. 182,070, dated September 12, 1876 application iled l Auguste-1,1876.

` To all whom it may concern:

. Beit known that I, PHILIP HENNERTyof NewfYork city, in the county andState 'of New York, have `invented a new and Improved Elevator, .of which the following is a specification: j n

Figure 1 isa vertical transverse'section of my improved elevator. Fig. 2 is a vertical longitudinal section thereof. Fig. 3-is a side view of the lower portion thereof; and Fig.

4, a horizontal section on the lineal x, Fig. 1.

Similarletters of reference indicate correspoliding parts in all the figures.

This invention relatesto an improved elevator of the kind that is supported and operated by lazy-tongs, and has for its object to :facilitate the manipulation of the apparatus and accelerate its motion. u

The invention consists, principally, in weighting the lower pair of the levers of the lazy-tongs, so that such levers will have the tendency, when the elevator is in its contracted position, to raise it into a vertical position and to extend the lazy-tongs.

The invention also consists in means for removing the weights from, or adjusting them on, said levers when the elevator is to be lowered, and in other details of invention hereinaftei` more fully pointed out. v

In the drawing, the letter A represents the frame of my improved elevator, in which the platform or cage B travels up and down. a a are two sets of lazy-tongs that support the cage-B at their upper'ends, while they are with their lower ends connected with the operating mechanism hereinafter described:V The cagaB is or'may be balanced by a pair of weights, b b, that are suspended from it by ropes that pass over friction-rollers c c at the upper part of the frame A, as clearly shown iu Fig. 2. To the base of the frarneA are set cured a pair of uprights or standards, d d, in

which are hung the endsof a crank-shaft, e, as shown. This crank-shaft engages, by suitable gearing f f, with two winding-drums, g g, that are, respectively, hung between the standards d and braces l1I h attached to said standards. Around eachof the drums g g is wound a pairof ropesor chains, t', that pass from said drums down over rollers j j at the lower parts of the standards, and thence connect, respect- `ively, with the ends of the lowermost levers K K ofthe two sets of lazy-tongs a a, said levers being pivoted and heldin place by a fixed pin or shaft, l. that is supported by the standards d; By revolving the crank-shaft e in one direction,y and thereby turning the drums g g, the ropes `or chains t t' will be wound upon such-drums, and the ends of the levers K K of each set of lazy-tongs will be drawn nearer together. This will cause the lazy-tongs a a` to rise and to lift the cage B.

In order to facilitate this operation, and to adapt the elevator tothe raising of heavy loads with but a comparatively small power, I have devised vthe means now to be described, which aid in drawing the ends of the levers K K of each set of lazy-tongs together.

The lower arm of each of the levers K K that is, that portion below the pivot l-is made longer than the upper arm above said pivot, and is slotted lengthwise, as shown in Fig. 1. These slots receive the journals or gudgeons of two heavy blocks or cylinders, D D, as shown.

m' that passover grooved rollers un, connected with a crank-shaft, o, which is hung with its ends in the standards d d, as clearly shown in Fig. 4. A pawl pivoted to the standard can be used to lock into a pinion on the shaft o, and to lock said crank-shaft o, if desired, to prevent its further revolution, as indicated iu Fig. 3. The weighted cylinders D will, uuder ordinary circumstances, rest with their journals or gudgeons in the lower parts of the slots of the levers K, but when the crank-shaft o is revolved they will be drawn upward, and can then be held suspended in any desired position by locking the crank-shaft o. With chains, a weight, E, which is .suspended vertically from said shaft, and is, more or less, equal in weight to the two cylinders or blocks D, so it will balance them while they are being raised. The weight E will thus render it easy to raise the Weights D, as in Fig. l, for

weight E can at once be neutralized by locking the' shaft o with the pawl and ratchet. It

the lower arms of the levers K K are swung The weights D are, by suitable chains or ropes the shaft o is also connected, by ropes or it descends while theyV ascend. Yet when the weights D are to affect the lazy-tongs theA is evident that lwhen the elevator is lowered shaft 0 with pawland ratchet.

vator is to be raised, andthe crank-shaft e isconsequently revolved,the weights D D,Irestin g `in the lower ends of the slots in levers K, as in Fig. 3, will aid in drawing the lower arms off-'levers K K downward into a nearly vertical position, and vwill thus aid in extending the lazytongs a a and vin raising the cage. Thus, bythe application of but acomparatively small additional power to the crank-shaft d the platform B will be raised by the aid of thc weightsD. By raising the Weights D D, which is done-byl Winding the ropes m upon the crank-shaft o, their power orn contracting the tongsA will be diminished in inverse proportion toy their dis'. tance fromthe pivot Z of thelevers K. The

elevator cani therefore be adjusted to. raise. loads of different weight when but the samev operative force is employed.

When the elevator is to be low.ered,vthe Weights D should be so, adjusted` as to-counx-` terfba-lancethe loadz to he taken down, and'` it' the elevator is to .be lowered Without earryin g any load they should be raised and locked to;I

their uppermost-position.

loweringof the, cage B may be. effeetedby means ofr a: crank-shaft.' thatv Windsa rope which is attached to the cage, or in any other suitable manner. 'Ihe cage B may be arrested at any desired height in the frame A by means of a paWl-an'd-ratchet attachment to the cranksbatte.,

I claim as my invention- 1. Thecombination, in an elevator, of the lazytongs'w a With a Weight, D, that is applied to the lower pair of levers constituting the lazy-tongs, substantially as and for the purpose setl'orth;

2; In a lazy-tongs elevator, the levers K K, made with slots, and combined with the Weights D that are adjustable in said slots,

' substantially as specitiedL 3.l The'combinationa ot" the slotted levers K with: the'y Weigh tsl), sh aft-l, ro e;m,` and: crank.-

shaft 0substantially1asf and: for'- the purpose specified; v

4:. In combination with the weightedarms K of? a lazy-tongs, andi withf the weights D theretor applied, the counter-weight E, andv sh aft; o, all arranged to-l operate substantijally` asgherein; shown; and;described.v It has alreadybeen y IEENNER'I.

Witnessesm A. V. Bremsen; ERNEST G. WEBB; 

